Human cooperation is highly unusual. We live in large groups composed mostly of non-
relatives. Evolutionists have proposed a number of explanations for this pattern, including …

Humans regularly help strangers, even when interactions are apparently unobserved and
unlikely to be repeated. Such situations have been simulated in the laboratory using …

The cultural group selection (CGS) approach provides a compelling explanation for recent
changes in human societies, but has trouble explaining why our ancestors, rather than any …

Can humanity work together to mitigate the effects of climate change? Climate Games
argues we can. This book brings together a decade and a half of experimentation …

We agree that institutions and rules are crucial for explaining human sociality, but we
question the claim of there not being “alternatives to CGS [that] can easily account for the …

Are humans too generous and too punitive? Many researchers have concluded that classic
theories of social evolution (eg, direct reciprocity, reputation) are not sufficient to explain …

Driven by intergroup competition, social norms, beliefs, and practices can evolve in ways
that more effectively tap into a wide variety of evolved psychological mechanisms to foster …

The properties of individual carbon atoms allow them to chain into complex molecules of
immense length. They are not limited to structures involving only a few atoms. The design …

The main objective of our target article was to sketch the empirical case for the importance of
selection at the level of groups on cultural variation. Such variation is massive in humans …

As evidence that cultural group selection has occurred, Richerson et al. simply retrodict that
humans use language, punish each other, and have religion. This is a meager empirical …